I use kindle touch, and I added a new e-book. I first set the book up in Word 2010, and I used ctrl+enter function after the last line in a chapter to keep the new chapter on a separate page. I created a ToC, and sent it all to my device. Now, whenever I come to an end of the chapter in kindle, the last line of a chapter ends, for example, in the middle of the screen, and then I have an empty (kindle) page, and then I have neatly formatted new chapter heading on top of its new page.

What am I doing wrong? What's the proper way to split pages after chapters?

I use kindle touch, and I added a new e-book. I first set the book up in Word 2010, and I used ctrl+enter function after the last line in a chapter to keep the new chapter on a separate page. I created a ToC, and sent it all to my device. Now, whenever I come to an end of the chapter in kindle, the last line of a chapter ends, for example, in the middle of the screen, and then I have an empty (kindle) page, and then I have neatly formatted new chapter heading on top of its new page.

What am I doing wrong? What's the proper way to split pages after chapters?

The normal Calibre settings (for books (that I convert/modify) will start a chapter (based upon the detection rules) on a fresh screen, you also put a fresh screen (marker) just before the detected one .

Look at the ALL the Structure detection rule optional settings in Preferences: (Conversion Common Options, especially the bottom one (for detection) and the pull down (may say Both)

You are right, theducks. There is no need to hit ctrl+enter after each paragraph, it's done automatically. Thanks a lot!

It seems I am yet much to learn about e-books.

That is not exactly an e-book thing, but a Calibre way (and user preference setting).
I read on a 5" device. I Like the way paper books are laid out...
So I start chapters on a fresh page. I indent paragraphs that have a a small paragraph spacing and increase the spacing 25% for a non indented style.
Standard margins are tiny (the display bezel is my big margin )

2 columns might be faked with tables, but then you mess up the reflow (there are few paperbacks with 2 columns, which closest match 5-6" readers for display area)
Charts and (real) tables are probably better on larger devices and sometimes must be done as Images, just to keep them sane under any resize.